Split common.h in two parts, purely internal stuff (internal.h) and things

available to external programs as well.
Also make more things available to external programs like GET_UTF8, MKTAG etc.

Originally committed as revision 5765 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 219 insertions, 0 deletions

diff --git a/libavutil/internal.h b/libavutil/internal.h
new file mode 100644
index 0000000000..3b31cdb3af
--- /dev/null
+++ b/libavutil/internal.h
@@ -0,0 +1,219 @@
+/**
+ * @file internal.h
+ * common internal api header.
+ */
+
+#ifndef INTERNAL_H
+#define INTERNAL_H
+
+#if ( defined(__PIC__) || defined(__pic__) ) && ! defined(PIC)
+#    define PIC
+#endif
+
+#    ifndef ENODATA
+#        define ENODATA  61
+#    endif
+
+#include <stddef.h>
+#ifndef offsetof
+# define offsetof(T,F) ((unsigned int)((char *)&((T *)0)->F))
+#endif
+
+#define AVOPTION_CODEC_BOOL(name, help, field) \
+    { name, help, offsetof(AVCodecContext, field), FF_OPT_TYPE_BOOL }
+#define AVOPTION_CODEC_DOUBLE(name, help, field, minv, maxv, defval) \
+    { name, help, offsetof(AVCodecContext, field), FF_OPT_TYPE_DOUBLE, minv, maxv, defval }
+#define AVOPTION_CODEC_FLAG(name, help, field, flag, defval) \
+    { name, help, offsetof(AVCodecContext, field), FF_OPT_TYPE_FLAG, flag, 0, defval }
+#define AVOPTION_CODEC_INT(name, help, field, minv, maxv, defval) \
+    { name, help, offsetof(AVCodecContext, field), FF_OPT_TYPE_INT, minv, maxv, defval }
+#define AVOPTION_CODEC_STRING(name, help, field, str, val) \
+    { name, help, offsetof(AVCodecContext, field), FF_OPT_TYPE_STRING, .defval = val, .defstr = str }
+#define AVOPTION_CODEC_RCOVERRIDE(name, help, field) \
+    { name, help, offsetof(AVCodecContext, field), FF_OPT_TYPE_RCOVERRIDE, .defval = 0, .defstr = NULL }
+#define AVOPTION_SUB(ptr) { .name = NULL, .help = (const char*)ptr }
+#define AVOPTION_END() AVOPTION_SUB(NULL)
+
+#ifdef __MINGW32__
+#    ifdef _DEBUG
+#        define DEBUG
+#    endif
+
+#    define snprintf _snprintf
+#    define vsnprintf _vsnprintf
+
+#    ifdef CONFIG_WINCE
+#        define perror(a)
+#    endif
+
+/* __MINGW32__ end */
+#elif defined (CONFIG_OS2)
+/* OS/2 EMX */
+
+#include <float.h>
+
+#endif /* !__MINGW32__ && CONFIG_OS2 */
+
+#    ifdef USE_FASTMEMCPY
+#        include "fastmemcpy.h"
+#    endif
+
+// Use rip-relative addressing if compiling PIC code on x86-64.
+#    if defined(__MINGW32__) || defined(__CYGWIN__) || \
+        defined(__OS2__) || (defined (__OpenBSD__) && !defined(__ELF__))
+#        if defined(ARCH_X86_64) && defined(PIC)
+#            define MANGLE(a) "_" #a"(%%rip)"
+#        else
+#            define MANGLE(a) "_" #a
+#        endif
+#    else
+#        if defined(ARCH_X86_64) && defined(PIC)
+#            define MANGLE(a) #a"(%%rip)"
+#        elif defined(CONFIG_DARWIN)
+#            define MANGLE(a) "_" #a
+#        else
+#            define MANGLE(a) #a
+#        endif
+#    endif
+
+/* debug stuff */
+
+#    if !defined(DEBUG) && !defined(NDEBUG)
+#        define NDEBUG
+#    endif
+#    include <assert.h>
+
+/* dprintf macros */
+#    ifdef DEBUG
+#        define dprintf(fmt,...) av_log(NULL, AV_LOG_DEBUG, fmt, __VA_ARGS__)
+#    else
+#        define dprintf(fmt,...)
+#    endif
+
+#    ifdef CONFIG_WINCE
+#            define abort()
+#    endif
+
+#    define av_abort()      do { av_log(NULL, AV_LOG_ERROR, "Abort at %s:%d\n", __FILE__, __LINE__); abort(); } while (0)
+
+extern const uint32_t inverse[256];
+
+#if defined(ARCH_X86) || defined(ARCH_X86_64)
+#    define FASTDIV(a,b) \
+    ({\
+        int ret,dmy;\
+        asm volatile(\
+            "mull %3"\
+            :"=d"(ret),"=a"(dmy)\
+            :"1"(a),"g"(inverse[b])\
+            );\
+        ret;\
+    })
+#elif defined(CONFIG_FASTDIV)
+#    define FASTDIV(a,b)   ((uint32_t)((((uint64_t)a)*inverse[b])>>32))
+#else
+#    define FASTDIV(a,b)   ((a)/(b))
+#endif
+
+/* math */
+extern FF_IMPORT_ATTR const uint8_t ff_sqrt_tab[128];
+
+static inline int ff_sqrt(int a)
+{
+    int ret=0;
+    int s;
+    int ret_sq=0;
+
+    if(a<128) return ff_sqrt_tab[a];
+
+    for(s=15; s>=0; s--){
+        int b= ret_sq + (1<<(s*2)) + (ret<<s)*2;
+        if(b<=a){
+            ret_sq=b;
+            ret+= 1<<s;
+        }
+    }
+    return ret;
+}
+
+#if defined(ARCH_X86) || defined(ARCH_X86_64)
+#define MASK_ABS(mask, level)\
+            asm volatile(\
+                "cdq                    \n\t"\
+                "xorl %1, %0            \n\t"\
+                "subl %1, %0            \n\t"\
+                : "+a" (level), "=&d" (mask)\
+            );
+#else
+#define MASK_ABS(mask, level)\
+            mask= level>>31;\
+            level= (level^mask)-mask;
+#endif
+
+#if __CPU__ >= 686 && !defined(RUNTIME_CPUDETECT)
+#define COPY3_IF_LT(x,y,a,b,c,d)\
+asm volatile (\
+    "cmpl %0, %3        \n\t"\
+    "cmovl %3, %0       \n\t"\
+    "cmovl %4, %1       \n\t"\
+    "cmovl %5, %2       \n\t"\
+    : "+r" (x), "+r" (a), "+r" (c)\
+    : "r" (y), "r" (b), "r" (d)\
+);
+#else
+#define COPY3_IF_LT(x,y,a,b,c,d)\
+if((y)<(x)){\
+     (x)=(y);\
+     (a)=(b);\
+     (c)=(d);\
+}
+#endif
+
+/* avoid usage of various functions */
+#define malloc please_use_av_malloc
+#define free please_use_av_free
+#define realloc please_use_av_realloc
+#define time time_is_forbidden_due_to_security_issues
+#define rand rand_is_forbidden_due_to_state_trashing
+#define srand srand_is_forbidden_due_to_state_trashing
+#define sprintf sprintf_is_forbidden_due_to_security_issues_use_snprintf
+#define strcat strcat_is_forbidden_due_to_security_issues_use_pstrcat
+#if !(defined(LIBAVFORMAT_BUILD) || defined(_FRAMEHOOK_H))
+#define printf please_use_av_log
+#define fprintf please_use_av_log
+#endif
+
+#define CHECKED_ALLOCZ(p, size)\
+{\
+    p= av_mallocz(size);\
+    if(p==NULL && (size)!=0){\
+        perror("malloc");\
+        goto fail;\
+    }\
+}
+
+#ifndef HAVE_LRINTF
+/* XXX: add ISOC specific test to avoid specific BSD testing. */
+/* better than nothing implementation. */
+/* btw, rintf() is existing on fbsd too -- alex */
+static always_inline long int lrintf(float x)
+{
+#ifdef __MINGW32__
+#  ifdef ARCH_X86
+    int32_t i;
+    asm volatile(
+        "fistpl %0\n\t"
+        : "=m" (i) : "t" (x) : "st"
+    );
+    return i;
+#  else
+    /* XXX: incorrect, but make it compile */
+    return (int)(x + (x < 0 ? -0.5 : 0.5));
+#  endif /* ARCH_X86 */
+#else
+    return (int)(rint(x));
+#endif /* __MINGW32__ */
+}
+#endif /* HAVE_LRINTF */
+
+#endif /* INTERNAL_H */